BES322776 – PAIS – AU2019 Page 1 BES322776 Design and Detail Shear Walls and Slabs in the most effective way with Revit Joseph PAIS GRAITEC Innovation Description In this class, you will discover a set of high-end effective tools to optimize, design and detail RC shear walls and slabs within a BIM platform such as Revit. You will discover firsthand how to store seismic results and theoretical reinforcement values in Revit and use them to design and detail shear walls and groups of shear walls, optimize the fabrics distribution over an entire slab, manage additional bars around openings. After having created and optimized the 3D rebar model based on design-driven rebar cages and reinforcement areas, we will go through the detailing part generating corresponding fabrics and rebar schedules, we will see how we can manage the bars splitting to consider fabrication and transportation constrains and generating the final reinforcement drawing. Do not miss this opportunity to discover a new workflow, new tools that will help you to make a major step forward in your futur rebar project management using Autodesk Revit and Graitec technology together. Learning Objectives • Store seismic results and theoretical reinforcement values in Revit • Generate Design-Driven 3D rebar cages for shear walls and group of shear walls. • Optimize the rebar and fabrics distribution in a slab taking into account fabrication constrains • Generate the detailing drawings including fabrics schedules on slabs and walls
Design and Detail Shear Walls and Slabs in the most effective way with Revit
Apr 05, 2023
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
BES322776
Design and Detail Shear Walls and Slabs in the most effective way with Revit
Joseph PAIS GRAITEC Innovation
Description
In this class, you will discover a set of high-end effective tools to optimize, design and detail RC shear walls and slabs within a BIM platform such as Revit. You will discover firsthand how to store seismic results and theoretical reinforcement values in Revit and use them to design and detail shear walls and groups of shear walls, optimize the fabrics distribution over an entire slab, manage additional bars around openings. After having created and optimized the 3D rebar model based on design-driven rebar cages and reinforcement areas, we will go through the detailing part generating corresponding fabrics and rebar schedules, we will see how we can manage the bars splitting to consider fabrication and transportation constrains and generating the final reinforcement drawing. Do not miss this opportunity to discover a new workflow, new tools that will help you to make a major step forward in your futur rebar project management using Autodesk Revit and Graitec technology together.
Learning Objectives
• Store seismic results and theoretical reinforcement values in Revit
• Generate Design-Driven 3D rebar cages for shear walls and group of shear walls.
• Optimize the rebar and fabrics distribution in a slab taking into account fabrication constrains
• Generate the detailing drawings including fabrics schedules on slabs and walls
BES322776 – PAIS – AU2019 Page 2
Speaker(s)
Joseph Pais is Product Director at GRAITEC INNOVATION in charge of all internal simulation products and also provides dynamic analysis and reinforced concrete consultancy to highly skilled GRAITEC customers. A structural engineer with 20+ years’ experience in the AEC industry. Joseph started his career working for the French SNCF Company on the “Concorde Lafayette” train substation. Then, in 1997, he moved to GRAITEC France as a structural engineer doing demos-training-projects on the internal calculation software’s, then being Product Manager for Structural analysis solutions and know Product Director for the entire Graitec Group. Joseph is also teaching dynamic analysis and reinforced concrete design since more than 10 years at the French university, Conservatoire National des Arts et Métiers (CNAM) in Paris. [email protected]
BES322776 – PAIS – AU2019 Page 3
Table of content Design and Detail Shear Walls and Slabs in the most effective way with Revit .......................... 1
Introduction ................................................................................................................................ 5
General concept ....................................................................................................................11
What are the benefits of applying a BIM Designers module within Revit®? ...........................13
How to store FEM results and theoretical reinforcement values in Revit? .................................17
Graitec Advance Design in few words. ..................................................................................17
Export the analytical model from Revit to Advance Design ....................................................19
Run the structural analysis and concrete design in Advance Design .....................................23
FEM Calculation.................................................................................................................23
Theoretical reinforcement values on slabs .........................................................................28
Export / Import back the results in Revit ................................................................................32
Export the results from Advance Design ............................................................................32
Synchronize those results back in Revit .............................................................................33
Generate Design-driven 3D rebar cages on shear walls & groups of shear walls ......................36
Define the design code to be applied .....................................................................................36
Define the design and reinforcement assumptions ................................................................37
Revit results packages and manual loads ..............................................................................39
RC calculation and detailed reports .......................................................................................41
Get and change the 3D rebar cages ......................................................................................43
Generate a 3D rebar cage on a shear wall just with detailing tools ........................................45
Optimize rebars and fabrics distribution in a RC slab ................................................................48
Interactive definition of area distributions ...............................................................................49
Automatic generation .............................................................................................................58
How do I do if I have no results? ............................................................................................62
Generate the detailing drawings including fabrics schedules on slabs and walls .......................64
Schedule Schemas ............................................................................................................64
Fabrics schemas ...................................................................................................................66
Split bars ...............................................................................................................................67
3D parametric rebar cages .................................................................................................75
Transversal distribution ......................................................................................................78
Bending detail ....................................................................................................................79
Symbols and Dimensions ...................................................................................................83
Reinforcement drawings creation .......................................................................................84
Conclusion ................................................................................................................................91
BES322776 – PAIS – AU2019 Page 5
Introduction In the AEC industry, everybody is speaking about BIM: BIM Managers & specialists, BIM workflows, 3D BIM models, BIM data... BIM became in the last years the industry de facto. But the reality is slightly different because if we cannot denie the importance of BIM in our industry, we have also to be aware that the progress status is different depending on the countries, the companies, the teams, the project. This statement is even more thrue if we speak about the rebar industry. Let’s be honest and ask yourself the following questions:
Where are you today in this world of BIM for your Rebar projects?
Are you actually being asked for 3D Rebar? If no, should you do it anyway or use
traditional methods? Can Revit produce Rebar, and if it can to what
level? Is there something that can enhance Revit’s
capabilities? I’m sure that most of you already have an answer to those questions and are pretty sure to be right. I’m not saying it’s not the case but allow me to bring you some new arguments that may confirm already what you have in mind or maybe bring you to change your mind and your vision on how to handle rebar projects! Even if you will not move to 3D rebar in the coming months, as soon as you start to think about, it will already be a win for me. Independtly from the time it will take, all industries are converging to the same point: applying an industrial connected BIM workflow to an entire project, bridging the gap between all the stakeholders of that project. The objective is clearly to build Better, More with Less, as explained by Andrew Anagnost – Autodesk CEO: build better to reach people expectations, build more and more to fit the demand, with less wastes! You may not see yet why I’m starting to write my class handout in such a way, with such global thinking. I’m personnally convinced that to built more and better with less wastes, we have to build before building, means to “DESIGN-SIMULATE-FABRICATE-MANAGE” the project throught a complete 3D BIM model having all data you need along those 4 stages of your project.
BES322776 – PAIS – AU2019 Page 6
Now, if we speak about the rebar detailing industry, it’s even worse and we have to admit that the switch from 2D to 3D is generally speaking not yet done. Detailers do not feel the need to have a 3D rebar model and exchange this data with other people. Currently, design and reinforcement drawings are shared between engineers and draftsmans and go through several iterations. Detailers are paid to produce drawings and the creation of these drawings is incredibly time consuming, even using existing tools which are most of the time 2D tools
If we look to the engineering companies, classical workflows still applied is most of the rebar projects:
The engineer runs a global analysis and designs each element, producing a design intent drawing or sometimes a more detailed one, which can be a 2D drawing in Autocad, some inputs from an Excel sheet, even sometime peace of papers.
The draftsman takes over the information and produces the reinforcement drawings including all annotations. In some cases, the draftsman can define all the constructive bars which are also dependent on country codes (Eurocodes, ACI codes, CSA codes, etc.). There may be several iterations between them to manage the full engineering cycle of a real project.
For sure, one possible way to change and improve those traditional workflows is to create an entire 3D rebar model, to create rebar objects having some BIM data which can be exchanged, monitored and postprocessed. This is a key change in the rebar industry and no doubt we are going there. Having this statement written, most of you have already the next question in mind: Can Revit produce rebar and drawings? If it can, to what level?
BES322776 – PAIS – AU2019 Page 7
Just try to google “rebar in Revit”:
I don’t need to comment this screenshot, It’s just crazy to see the amount of information, examples you get when searching about rebar in Revit... This is a first part of the answer to that question. Of course, one of the challenges to get a 3D rebar model is the time it takes to create it. In order to improve in a significant way, the production of the 3D rebar cages on a building, let me explain you what i called: the “80%-20%” rule. Let’s try to see how much different ways we can identify to produce 3D rebar cages on a building:
BES322776 – PAIS – AU2019 Page 8
We can, or let’s say we should, automate the design and rebar on standard elements in or der to not spend too much time on this part of the engineering job which is not the most interestiing one. This can be done using the native Revit® tools + the GRAITEC BIM Designers tools (https://www.graitec.com/advance-bim-designers/) that i will introduce later in this document.
We can continue also to annotate the elements, place dimensions, create the drawing using also the out of box Revit® functionalities completed by add-ons as the PowerPack for Revit® from GRAITEC (http://www.graitec.com/en/powerpack-for-revit).
The user can also apply advanced technologies provided by Autodesk®, such as Dynamo, to reinforce complex 3D geometries.
In this class handout, we will detail the two first points, especially for Slabs and Walls which are even more time consuming on the design and detailing point of view. Now, if we come back to the definition of the “80%-20%” rule, the production of the 3D rebar cages and the associated documentation can be automated on 80% of the structural elements allowing the engineering team to concentrate on the 20% remaining part:
BES322776 – PAIS – AU2019 Page 9
Another complexity is the conception of such a technology in a time full of uncertainties. Who is able to say how the industry will adopt BIM? How long it will take? That is why we think it is important to analyze how an adaptive technology can help users switch to a full BIM workflow. There is no doubt that today most engineers and draftsmen still use AutoCAD, eventually enriched with an add-on module, to directly produce 2D reinforcement drawings without handling a 3D rebar model. Bearing this in mind, it is clear that Revit® comes with inventive (sometime disruptive) technology which is changing this way of working. Having a 3D reinforcement model introduce new innovative opportunities to automate the reinforcement drawings starting with this 3D reinforcement model created and handled in Revit Structure®. In this class, I will propose you a way to switch from a 2D workflow to an effective BIM worklfow based on a 3D rebar model. I will explain you this workflow focusing on shear walls and slabs, having in mind that you can also apply this workflow to beams, columns and footings reinforced concrete members.
Native Revit Rebar tools To really understand the benefits of the tools I will explain you, I need to be sure that you know enough about the native rebar tools in Revit. So, let’s first have a quick view on the Revit native tools to place rebar on elements. The objective here is not to list them in details but just to have an overview. We can use the standard reinforcement tools in Revit to place single and groups of rebar by space or number along with area reinforcement, path reinforcement and fabric sheets:
By selecting an element, we are given the rebar tool on the ribbon and we have a Rebar Shape browser or dropdown to pick the correct rebar shape, then using placement plane and placement orientation to position the rebar accordingly inside the host Revit element. This method of reinforcement is relatively easy but can be time consuming because we will possibly be jumping between multiple views to get the correct placement or also because a large number of bars to be created especially when we deal with Slabs and Walls rebar.
BES322776 – PAIS – AU2019 Page 10
In the following picture, we summarize the ’standard’ workflow to create 3D rebar cages and reinforcement drawings using the existing tools in Revit Structure®:
BES322776 – PAIS – AU2019 Page 11
Let’s take the example of an isolated footing from a 3D model in Revit®. The objective is to create the 3D rebar cage and the corresponding drawing inside this structural element.
First, we have to create several 2D views (sections, elevations, callouts, etc.) around the element.
Then working on those different 2D views, we can start to place reinforcement bars using the Rebar Shape Browser in Revit®. Of course, as you know, to create all the bars, we need to switch several times between the different 2D generated views.
We also have to place in the different 2D views, all the tags, annotations, dimension lines, etc.
At the end of this process, we have the final 3D rebar cage completed for the corresponding structural element.
The final step is to create a drawing sheet, include in it the different 2D views, defining the right position and the right scale and define manually the rebar schedule if needed.
The complete process can take tens of minutes depending on the complexity of the elements to be reinforced. Of course, we have to repeat this work for every element to be reinforced. This is incredibly time consuming and not the most interesting part of the job for a draftsman! So we see that Revit® is definitively the right BIM platform to handle 3D rebar models but we see also that there is room for specific tools to powerup Revit® for rebar placement and management. Here is our objective with the GRAITEC BIM Designers!
What are GRAITEC BIM Designers ?
General concept Let me introduce what are the GRAITEC BIM Designers modules! GRAITEC BIM Designers are the next-generation software for automation, optimization and interoperability. Combining analysis, intuitive modelling, automatic drawing and report creation, GRAITEC BIM Designers are crafted to deliver exceptional performance and design accuracy across multiple BIM and analytical software applications for concrete and steel members.
BES322776 – PAIS – AU2019 Page 12
Working across multiple software platforms, including GRAITEC Advance Design, Autodesk® Advance Steel and Autodesk® Revit®, GRAITEC BIM Designers enable users to utilize the same model and analytical data simultaneously across all supported applications.
We will see that this multiplatform approach opens broad possibilities for multiple BIM workflows, especially if we include multi-users projects. For the moment, let’s come back on the BIM Designers concept. With easy-to-use intuitive modelling tools, comprehensive built-in analytical assumptions covering a wide spectrum of uses and customizable outputs, GRAITEC BIM Designers not only add analytical capabilities to Revit® but also automate the creation and design of the 3D rebar models, producing fully detailed documents and simplifying and supporting a complex multi-discipline model-sharing BIM exchange workflow. We will detail later in this handout the design capabilities of the GRAITEC BIM Designers in Revit.
BES322776 – PAIS – AU2019 Page 13
If you remember well the beginning of this class handout, we said that on a standard building, we can automate the production of 3D rebar cages on 80% of the building:
That’s the purpose of our GRAITEC BIM Designers!
What are the benefits of applying a BIM Designers module within Revit®? Using the BIM Designers in Revit® does not change or make your workflow in Revit® more complex. On the contrary, they provide the Revit® user with increased productivity for 3D rebar cage creation and 3D reinforcement drawings:
The BIM Designers provide a set of detailing tools to PowerUp your Revit® for Rebar projects.
BIM Designers handle within Revit® the design of the elements and the automatic generation of the corresponding 3D rebar cage. The tools generate native Revit objects!
Automatic creation of technical documentation: design reports, details Revit® views, drawing sheets, annotations and bar tags…
Enrichment of the BIM model in Revit Structure® with the consolidation of the entire engineering data.
BES322776 – PAIS – AU2019 Page 14
These modules are integrated in Revit Structure® and all the corresponding functions are available in different specific ribbons depending if you want to use the design tools (ribbon called “GRAITEC Concrete”) or the detailing tools (ribbon called “GRAITEC Detailing”):
Here is ribbon including the design tools:
And the one including the detailing tools:
We also have a specific ribbon for the tools dedicated to the design and the detailing job of RC slabs, called “GRAITEC Slab”:
So as you can see, the BIM Designers is a wide range set of tools for all kind of users, from the draftman to the structural engineer, providing dedicated tools for each step of the project. Nothing is magic and coming from the hat! To automate the production of the 3D rebar cages in Revit®, the BIM Designers are embedding the reinforced concrete design within Revit®. Going through the BIM Designers ribbons, you will be able to:
Define the concrete design assumptions (code dependent) within Revit®! Define the reinforcement assumptions, which are also partially design code dependent. Run the calculation of the concrete members and access to the design results:
Detailed reports Internal forces, stresses, deflections diagrams Working ratios Warning and error messages…
Produce the Revit® detail views and drawing sheets applying your Revit® drawing templates.
BES322776 – PAIS – AU2019 Page 15
Here are some screenshots about a RC Beam and a RC Column design and detailing in Revit with the Graitec BIM Designers:
BES322776 – PAIS – AU2019 Page 16
Our proposal with BIM Designers is not to change this workflow with a ’standard’ Revit® workflow, but to automate it:
1. We can take the same example as before - we want to create the 3D rebar cage on an isolated footing and produce the reinforcement drawings.
2. To do this, we just need to access the specific ’BIM Designers’ ribbon and run the calculation of the element.
3. Then you automatically get the design-driven 3D rebar cage, the corresponding detailed calculation report, the automatic creation of the requested 2D views, the bar schedule and the final drawing sheet of the element.
With BIM Designers, you can do this with just one click - and a job that takes several minutes to do with standard Revit Structure® tools will take just a few seconds! Just imagine the huge increase in productivity you will get. That’s what we call: ‘innovative technologies for the service of users!’
Let’s now discover the core subject of this class handout: how to design and detail reinforced concrete walls and slabs within Revit®.
1 3
BES322776 – PAIS – AU2019 Page 17
For that, we will go through the following steps which are also the key learning objective of the class:
First, we need to store in Revit® some FEM results (including seismic results to design the shear walls) and theoretical reinforcement results. For that part, we will use the link with Advance Design.
Then, we will see how to generate Design-Driven 3D rebar cages for shear walls and group of shear walls
We will optimize the rebar and fabrics distribution in a slab according to the theoretical reinforcement values imported in Revit® and considering the fabrication constrains.
We will finally discover some detailing tools to fine-tune the views and generate the rebar drawings including fabrics schedules on slabs and walls.
Let’s go!
How to store FEM results and theoretical reinforcement values in Revit?
Graitec Advance Design in few words. In the following workflow, I’m using the software Advance Design to run the structural analysis and save back in Revit® the FEM and Concrete design results. My objective is not to make a detailed presentation of this software but it’s difficult for me to talk about it without introducing it a bit. Advance Design is a mature and easy to use 3D FEM software developed by Graitec, existing since more…
Design and Detail Shear Walls and Slabs in the most effective way with Revit
Joseph PAIS GRAITEC Innovation
Description
In this class, you will discover a set of high-end effective tools to optimize, design and detail RC shear walls and slabs within a BIM platform such as Revit. You will discover firsthand how to store seismic results and theoretical reinforcement values in Revit and use them to design and detail shear walls and groups of shear walls, optimize the fabrics distribution over an entire slab, manage additional bars around openings. After having created and optimized the 3D rebar model based on design-driven rebar cages and reinforcement areas, we will go through the detailing part generating corresponding fabrics and rebar schedules, we will see how we can manage the bars splitting to consider fabrication and transportation constrains and generating the final reinforcement drawing. Do not miss this opportunity to discover a new workflow, new tools that will help you to make a major step forward in your futur rebar project management using Autodesk Revit and Graitec technology together.
Learning Objectives
• Store seismic results and theoretical reinforcement values in Revit
• Generate Design-Driven 3D rebar cages for shear walls and group of shear walls.
• Optimize the rebar and fabrics distribution in a slab taking into account fabrication constrains
• Generate the detailing drawings including fabrics schedules on slabs and walls
BES322776 – PAIS – AU2019 Page 2
Speaker(s)
Joseph Pais is Product Director at GRAITEC INNOVATION in charge of all internal simulation products and also provides dynamic analysis and reinforced concrete consultancy to highly skilled GRAITEC customers. A structural engineer with 20+ years’ experience in the AEC industry. Joseph started his career working for the French SNCF Company on the “Concorde Lafayette” train substation. Then, in 1997, he moved to GRAITEC France as a structural engineer doing demos-training-projects on the internal calculation software’s, then being Product Manager for Structural analysis solutions and know Product Director for the entire Graitec Group. Joseph is also teaching dynamic analysis and reinforced concrete design since more than 10 years at the French university, Conservatoire National des Arts et Métiers (CNAM) in Paris. [email protected]
BES322776 – PAIS – AU2019 Page 3
Table of content Design and Detail Shear Walls and Slabs in the most effective way with Revit .......................... 1
Introduction ................................................................................................................................ 5
General concept ....................................................................................................................11
What are the benefits of applying a BIM Designers module within Revit®? ...........................13
How to store FEM results and theoretical reinforcement values in Revit? .................................17
Graitec Advance Design in few words. ..................................................................................17
Export the analytical model from Revit to Advance Design ....................................................19
Run the structural analysis and concrete design in Advance Design .....................................23
FEM Calculation.................................................................................................................23
Theoretical reinforcement values on slabs .........................................................................28
Export / Import back the results in Revit ................................................................................32
Export the results from Advance Design ............................................................................32
Synchronize those results back in Revit .............................................................................33
Generate Design-driven 3D rebar cages on shear walls & groups of shear walls ......................36
Define the design code to be applied .....................................................................................36
Define the design and reinforcement assumptions ................................................................37
Revit results packages and manual loads ..............................................................................39
RC calculation and detailed reports .......................................................................................41
Get and change the 3D rebar cages ......................................................................................43
Generate a 3D rebar cage on a shear wall just with detailing tools ........................................45
Optimize rebars and fabrics distribution in a RC slab ................................................................48
Interactive definition of area distributions ...............................................................................49
Automatic generation .............................................................................................................58
How do I do if I have no results? ............................................................................................62
Generate the detailing drawings including fabrics schedules on slabs and walls .......................64
Schedule Schemas ............................................................................................................64
Fabrics schemas ...................................................................................................................66
Split bars ...............................................................................................................................67
3D parametric rebar cages .................................................................................................75
Transversal distribution ......................................................................................................78
Bending detail ....................................................................................................................79
Symbols and Dimensions ...................................................................................................83
Reinforcement drawings creation .......................................................................................84
Conclusion ................................................................................................................................91
BES322776 – PAIS – AU2019 Page 5
Introduction In the AEC industry, everybody is speaking about BIM: BIM Managers & specialists, BIM workflows, 3D BIM models, BIM data... BIM became in the last years the industry de facto. But the reality is slightly different because if we cannot denie the importance of BIM in our industry, we have also to be aware that the progress status is different depending on the countries, the companies, the teams, the project. This statement is even more thrue if we speak about the rebar industry. Let’s be honest and ask yourself the following questions:
Where are you today in this world of BIM for your Rebar projects?
Are you actually being asked for 3D Rebar? If no, should you do it anyway or use
traditional methods? Can Revit produce Rebar, and if it can to what
level? Is there something that can enhance Revit’s
capabilities? I’m sure that most of you already have an answer to those questions and are pretty sure to be right. I’m not saying it’s not the case but allow me to bring you some new arguments that may confirm already what you have in mind or maybe bring you to change your mind and your vision on how to handle rebar projects! Even if you will not move to 3D rebar in the coming months, as soon as you start to think about, it will already be a win for me. Independtly from the time it will take, all industries are converging to the same point: applying an industrial connected BIM workflow to an entire project, bridging the gap between all the stakeholders of that project. The objective is clearly to build Better, More with Less, as explained by Andrew Anagnost – Autodesk CEO: build better to reach people expectations, build more and more to fit the demand, with less wastes! You may not see yet why I’m starting to write my class handout in such a way, with such global thinking. I’m personnally convinced that to built more and better with less wastes, we have to build before building, means to “DESIGN-SIMULATE-FABRICATE-MANAGE” the project throught a complete 3D BIM model having all data you need along those 4 stages of your project.
BES322776 – PAIS – AU2019 Page 6
Now, if we speak about the rebar detailing industry, it’s even worse and we have to admit that the switch from 2D to 3D is generally speaking not yet done. Detailers do not feel the need to have a 3D rebar model and exchange this data with other people. Currently, design and reinforcement drawings are shared between engineers and draftsmans and go through several iterations. Detailers are paid to produce drawings and the creation of these drawings is incredibly time consuming, even using existing tools which are most of the time 2D tools
If we look to the engineering companies, classical workflows still applied is most of the rebar projects:
The engineer runs a global analysis and designs each element, producing a design intent drawing or sometimes a more detailed one, which can be a 2D drawing in Autocad, some inputs from an Excel sheet, even sometime peace of papers.
The draftsman takes over the information and produces the reinforcement drawings including all annotations. In some cases, the draftsman can define all the constructive bars which are also dependent on country codes (Eurocodes, ACI codes, CSA codes, etc.). There may be several iterations between them to manage the full engineering cycle of a real project.
For sure, one possible way to change and improve those traditional workflows is to create an entire 3D rebar model, to create rebar objects having some BIM data which can be exchanged, monitored and postprocessed. This is a key change in the rebar industry and no doubt we are going there. Having this statement written, most of you have already the next question in mind: Can Revit produce rebar and drawings? If it can, to what level?
BES322776 – PAIS – AU2019 Page 7
Just try to google “rebar in Revit”:
I don’t need to comment this screenshot, It’s just crazy to see the amount of information, examples you get when searching about rebar in Revit... This is a first part of the answer to that question. Of course, one of the challenges to get a 3D rebar model is the time it takes to create it. In order to improve in a significant way, the production of the 3D rebar cages on a building, let me explain you what i called: the “80%-20%” rule. Let’s try to see how much different ways we can identify to produce 3D rebar cages on a building:
BES322776 – PAIS – AU2019 Page 8
We can, or let’s say we should, automate the design and rebar on standard elements in or der to not spend too much time on this part of the engineering job which is not the most interestiing one. This can be done using the native Revit® tools + the GRAITEC BIM Designers tools (https://www.graitec.com/advance-bim-designers/) that i will introduce later in this document.
We can continue also to annotate the elements, place dimensions, create the drawing using also the out of box Revit® functionalities completed by add-ons as the PowerPack for Revit® from GRAITEC (http://www.graitec.com/en/powerpack-for-revit).
The user can also apply advanced technologies provided by Autodesk®, such as Dynamo, to reinforce complex 3D geometries.
In this class handout, we will detail the two first points, especially for Slabs and Walls which are even more time consuming on the design and detailing point of view. Now, if we come back to the definition of the “80%-20%” rule, the production of the 3D rebar cages and the associated documentation can be automated on 80% of the structural elements allowing the engineering team to concentrate on the 20% remaining part:
BES322776 – PAIS – AU2019 Page 9
Another complexity is the conception of such a technology in a time full of uncertainties. Who is able to say how the industry will adopt BIM? How long it will take? That is why we think it is important to analyze how an adaptive technology can help users switch to a full BIM workflow. There is no doubt that today most engineers and draftsmen still use AutoCAD, eventually enriched with an add-on module, to directly produce 2D reinforcement drawings without handling a 3D rebar model. Bearing this in mind, it is clear that Revit® comes with inventive (sometime disruptive) technology which is changing this way of working. Having a 3D reinforcement model introduce new innovative opportunities to automate the reinforcement drawings starting with this 3D reinforcement model created and handled in Revit Structure®. In this class, I will propose you a way to switch from a 2D workflow to an effective BIM worklfow based on a 3D rebar model. I will explain you this workflow focusing on shear walls and slabs, having in mind that you can also apply this workflow to beams, columns and footings reinforced concrete members.
Native Revit Rebar tools To really understand the benefits of the tools I will explain you, I need to be sure that you know enough about the native rebar tools in Revit. So, let’s first have a quick view on the Revit native tools to place rebar on elements. The objective here is not to list them in details but just to have an overview. We can use the standard reinforcement tools in Revit to place single and groups of rebar by space or number along with area reinforcement, path reinforcement and fabric sheets:
By selecting an element, we are given the rebar tool on the ribbon and we have a Rebar Shape browser or dropdown to pick the correct rebar shape, then using placement plane and placement orientation to position the rebar accordingly inside the host Revit element. This method of reinforcement is relatively easy but can be time consuming because we will possibly be jumping between multiple views to get the correct placement or also because a large number of bars to be created especially when we deal with Slabs and Walls rebar.
BES322776 – PAIS – AU2019 Page 10
In the following picture, we summarize the ’standard’ workflow to create 3D rebar cages and reinforcement drawings using the existing tools in Revit Structure®:
BES322776 – PAIS – AU2019 Page 11
Let’s take the example of an isolated footing from a 3D model in Revit®. The objective is to create the 3D rebar cage and the corresponding drawing inside this structural element.
First, we have to create several 2D views (sections, elevations, callouts, etc.) around the element.
Then working on those different 2D views, we can start to place reinforcement bars using the Rebar Shape Browser in Revit®. Of course, as you know, to create all the bars, we need to switch several times between the different 2D generated views.
We also have to place in the different 2D views, all the tags, annotations, dimension lines, etc.
At the end of this process, we have the final 3D rebar cage completed for the corresponding structural element.
The final step is to create a drawing sheet, include in it the different 2D views, defining the right position and the right scale and define manually the rebar schedule if needed.
The complete process can take tens of minutes depending on the complexity of the elements to be reinforced. Of course, we have to repeat this work for every element to be reinforced. This is incredibly time consuming and not the most interesting part of the job for a draftsman! So we see that Revit® is definitively the right BIM platform to handle 3D rebar models but we see also that there is room for specific tools to powerup Revit® for rebar placement and management. Here is our objective with the GRAITEC BIM Designers!
What are GRAITEC BIM Designers ?
General concept Let me introduce what are the GRAITEC BIM Designers modules! GRAITEC BIM Designers are the next-generation software for automation, optimization and interoperability. Combining analysis, intuitive modelling, automatic drawing and report creation, GRAITEC BIM Designers are crafted to deliver exceptional performance and design accuracy across multiple BIM and analytical software applications for concrete and steel members.
BES322776 – PAIS – AU2019 Page 12
Working across multiple software platforms, including GRAITEC Advance Design, Autodesk® Advance Steel and Autodesk® Revit®, GRAITEC BIM Designers enable users to utilize the same model and analytical data simultaneously across all supported applications.
We will see that this multiplatform approach opens broad possibilities for multiple BIM workflows, especially if we include multi-users projects. For the moment, let’s come back on the BIM Designers concept. With easy-to-use intuitive modelling tools, comprehensive built-in analytical assumptions covering a wide spectrum of uses and customizable outputs, GRAITEC BIM Designers not only add analytical capabilities to Revit® but also automate the creation and design of the 3D rebar models, producing fully detailed documents and simplifying and supporting a complex multi-discipline model-sharing BIM exchange workflow. We will detail later in this handout the design capabilities of the GRAITEC BIM Designers in Revit.
BES322776 – PAIS – AU2019 Page 13
If you remember well the beginning of this class handout, we said that on a standard building, we can automate the production of 3D rebar cages on 80% of the building:
That’s the purpose of our GRAITEC BIM Designers!
What are the benefits of applying a BIM Designers module within Revit®? Using the BIM Designers in Revit® does not change or make your workflow in Revit® more complex. On the contrary, they provide the Revit® user with increased productivity for 3D rebar cage creation and 3D reinforcement drawings:
The BIM Designers provide a set of detailing tools to PowerUp your Revit® for Rebar projects.
BIM Designers handle within Revit® the design of the elements and the automatic generation of the corresponding 3D rebar cage. The tools generate native Revit objects!
Automatic creation of technical documentation: design reports, details Revit® views, drawing sheets, annotations and bar tags…
Enrichment of the BIM model in Revit Structure® with the consolidation of the entire engineering data.
BES322776 – PAIS – AU2019 Page 14
These modules are integrated in Revit Structure® and all the corresponding functions are available in different specific ribbons depending if you want to use the design tools (ribbon called “GRAITEC Concrete”) or the detailing tools (ribbon called “GRAITEC Detailing”):
Here is ribbon including the design tools:
And the one including the detailing tools:
We also have a specific ribbon for the tools dedicated to the design and the detailing job of RC slabs, called “GRAITEC Slab”:
So as you can see, the BIM Designers is a wide range set of tools for all kind of users, from the draftman to the structural engineer, providing dedicated tools for each step of the project. Nothing is magic and coming from the hat! To automate the production of the 3D rebar cages in Revit®, the BIM Designers are embedding the reinforced concrete design within Revit®. Going through the BIM Designers ribbons, you will be able to:
Define the concrete design assumptions (code dependent) within Revit®! Define the reinforcement assumptions, which are also partially design code dependent. Run the calculation of the concrete members and access to the design results:
Detailed reports Internal forces, stresses, deflections diagrams Working ratios Warning and error messages…
Produce the Revit® detail views and drawing sheets applying your Revit® drawing templates.
BES322776 – PAIS – AU2019 Page 15
Here are some screenshots about a RC Beam and a RC Column design and detailing in Revit with the Graitec BIM Designers:
BES322776 – PAIS – AU2019 Page 16
Our proposal with BIM Designers is not to change this workflow with a ’standard’ Revit® workflow, but to automate it:
1. We can take the same example as before - we want to create the 3D rebar cage on an isolated footing and produce the reinforcement drawings.
2. To do this, we just need to access the specific ’BIM Designers’ ribbon and run the calculation of the element.
3. Then you automatically get the design-driven 3D rebar cage, the corresponding detailed calculation report, the automatic creation of the requested 2D views, the bar schedule and the final drawing sheet of the element.
With BIM Designers, you can do this with just one click - and a job that takes several minutes to do with standard Revit Structure® tools will take just a few seconds! Just imagine the huge increase in productivity you will get. That’s what we call: ‘innovative technologies for the service of users!’
Let’s now discover the core subject of this class handout: how to design and detail reinforced concrete walls and slabs within Revit®.
1 3
BES322776 – PAIS – AU2019 Page 17
For that, we will go through the following steps which are also the key learning objective of the class:
First, we need to store in Revit® some FEM results (including seismic results to design the shear walls) and theoretical reinforcement results. For that part, we will use the link with Advance Design.
Then, we will see how to generate Design-Driven 3D rebar cages for shear walls and group of shear walls
We will optimize the rebar and fabrics distribution in a slab according to the theoretical reinforcement values imported in Revit® and considering the fabrication constrains.
We will finally discover some detailing tools to fine-tune the views and generate the rebar drawings including fabrics schedules on slabs and walls.
Let’s go!
How to store FEM results and theoretical reinforcement values in Revit?
Graitec Advance Design in few words. In the following workflow, I’m using the software Advance Design to run the structural analysis and save back in Revit® the FEM and Concrete design results. My objective is not to make a detailed presentation of this software but it’s difficult for me to talk about it without introducing it a bit. Advance Design is a mature and easy to use 3D FEM software developed by Graitec, existing since more…
Related Documents
